Last Weekend's Party Circuit: Cooper Square Hotel Up, High Heels Down

The penthouse's patio was the place to see and be seen in Manhattan this weekend. On Saturday and Sunday afternoon, guests at the Carrera Summer Escape did yoga, sunbathed, and sipped on cocktails and Bustelo Cool. Columbia Records took over the space on Saturday night for an All Points West after-party that attracted the likes of model Agyness Deyn, recording artists the Ting Tings, designer Alexander Wang, and social fixtures Zoë Kravitz and Bobby Kennedy III. And on Sunday night, indie rock band Peter Bjorn and John performed an acoustic set for a crowd including Mischa Barton, who was making her first appearance on the party scene after her hospital stint.

Swimming Pools

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Michael Phelps was the most decorated athlete at the swimming world championships in Rome, taking home five gold medals and one silver. Lapo Elkann was among those watching in the stands.

Christie Brinkley

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Billy Joel's second wife wowed guests at Saturday's Southampton Summer Party, where she appeared in a full-length yellow gown, but she was likely less than thrilled to hear that the Piano Man has been pining for his third ex-wife.

High Heels

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Plenty of "It" girls thought it was a good idea to wear spindly stilts to Super Saturday, a Hamptons shopping event that took place in a crazy field.

The God of rap thrilled muddy fans at All Points West, in Jersey City, with an 80-minute set that opened with a rendition of "No Sleep Till Brooklyn" to honor the Beastie Boys, who had to pull out of the show when Adam Yauch was diagnosed with cancer. Coldplay also gets our thumbs-up for closing out the weekend-long festival.